Support for encoding of complete character set—Some coding techniques provide code for encoding only the alphabets like the Caesar cipher, A1Z26, Atbash codes, etc. However, since a plain text message may be alphanumerically comprising of alphabets, numbers, and special characters, the coding technique must help to encode the complete character set.

Possible for representation, manipulation, and storage in digital systems—Some encoding techniques result in the production of codes which are in the form of an image(s) or symbol(s) or pattern(s) for the alphabet or character set that is encoded. However, these image(s) or symbol(s) or pattern(s) cannot be directly represented, manipulated, and stored in digital systems. Dorabella cipher, Morse codes, Dice Cipher, Rosicrucian Cipher are some examples of such coding techniques which produce symbols or patterns as codes that are not suitable for direct representation, manipulation, and storage in digital systems.